---
title: Log Entry
description: A template that represents a single runtime log entry.
location: https://istio.io/docs/reference/config/policy-and-telemetry/templates/logentry.html
layout: protoc-gen-docs
generator: protoc-gen-docs
aliases:
  - /docs/reference/config/template/logentry.html
number_of_entries: 3
---
<p>The <code>logentry</code> template represents an individual entry within a log.</p>

<p>Example config:</p>

<pre><code class="language-yaml">apiVersion: &quot;config.istio.io/v1alpha2&quot;
kind: logentry
metadata:
  name: accesslog
  namespace: istio-system
spec:
  severity: '&quot;Default&quot;'
  timestamp: request.time
  variables:
    sourceIp: source.ip | ip(&quot;0.0.0.0&quot;)
    destinationIp: destination.ip | ip(&quot;0.0.0.0&quot;)
    sourceUser: source.user | &quot;&quot;
    method: request.method | &quot;&quot;
    url: request.path | &quot;&quot;
    protocol: request.scheme | &quot;http&quot;
    responseCode: response.code | 0
    responseSize: response.size | 0
    requestSize: request.size | 0
    latency: response.duration | &quot;0ms&quot;
  monitored_resource_type: '&quot;UNSPECIFIED&quot;'
</code></pre>

<h2 id="Template">Template</h2>
<section>
<p>The <code>logentry</code> template represents an individual entry within a log.</p>

<p>When writing the configuration, the value for the fields associated with this template can either be a
literal or an <a href="https://istio.io/docs/reference//config/policy-and-telemetry/expression-language/">expression</a>. Please note that if the datatype of a field is not istio.policy.v1beta1.Value,
then the expression&rsquo;s <a href="https://istio.io/docs/reference//config/policy-and-telemetry/expression-language/#type-checking">inferred type</a> must match the datatype of the field.</p>

<table class="message-fields">
<thead>
<tr>
<th>Field</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr id="Template-variables">
<td><code>variables</code></td>
<td><code>map&lt;string,&nbsp;<a href="#istio-policy-v1beta1-Value">istio.policy.v1beta1.Value</a>&gt;</code></td>
<td>
<p>Variables that are delivered for each log entry.</p>

</td>
</tr>
<tr id="Template-timestamp">
<td><code>timestamp</code></td>
<td><code><a href="#istio-policy-v1beta1-TimeStamp">istio.policy.v1beta1.TimeStamp</a></code></td>
<td>
<p>Timestamp is the time value for the log entry</p>

</td>
</tr>
<tr id="Template-severity">
<td><code>severity</code></td>
<td><code>string</code></td>
<td>
<p>Severity indicates the importance of the log entry.</p>

</td>
</tr>
<tr id="Template-monitored_resource_type">
<td><code>monitoredResourceType</code></td>
<td><code>string</code></td>
<td>
<p>Optional. An expression to compute the type of the monitored resource this log entry is being recorded on.
If the logging backend supports monitored resources, these fields are used to populate that resource.
Otherwise these fields will be ignored by the adapter.</p>

</td>
</tr>
<tr id="Template-monitored_resource_dimensions">
<td><code>monitoredResourceDimensions</code></td>
<td><code>map&lt;string,&nbsp;<a href="#istio-policy-v1beta1-Value">istio.policy.v1beta1.Value</a>&gt;</code></td>
<td>
<p>Optional. A set of expressions that will form the dimensions of the monitored resource this log entry is being
recorded on. If the logging backend supports monitored resources, these fields are used to populate that resource.
Otherwise these fields will be ignored by the adapter.</p>

</td>
</tr>
</tbody>
</table>
</section>
<h2 id="istio-policy-v1beta1-TimeStamp">istio.policy.v1beta1.TimeStamp</h2>
<section>
<p>An instance field of type TimeStamp denotes that the expression for the field must evalaute to
<em>ValueType.TIMESTAMP</em></p>

<p>Objects of type TimeStamp are also passed to the adapters during request-time for the instance fields of
type TimeStamp</p>

<table class="message-fields">
<thead>
<tr>
<th>Field</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr id="istio-policy-v1beta1-TimeStamp-value">
<td><code>value</code></td>
<td><code><a href="https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#timestamp">google.protobuf.Timestamp</a></code></td>
<td>
<p>TimeStamp encoded as google.protobuf.Timestamp.</p>

</td>
</tr>
</tbody>
</table>
</section>
<h2 id="istio-policy-v1beta1-Value">istio.policy.v1beta1.Value</h2>
<section>
<p>An instance field of type Value denotes that the expression for the field is of dynamic type and can evalaute to any
<em>ValueType</em> enum values. For example, when
authoring an instance configuration for a template that has a field <code>data</code> of type <code>istio.policy.v1beta1.Value</code>,
both of the following expressions are valid <code>data: source.ip | ip(&quot;0.0.0.0&quot;)</code>, <code>data: request.id | &quot;&quot;</code>;
the resulting type is either ValueType.IP_ADDRESS or ValueType.STRING for the two cases respectively.</p>

<p>Objects of type Value are also passed to the adapters during request-time. There is a 1:1 mapping between
oneof fields in <code>Value</code> and enum values inside <code>ValueType</code>. Depending on the expression&rsquo;s evaluated <code>ValueType</code>,
the equivalent oneof field in <code>Value</code> is populated by Mixer and passed to the adapters.</p>

<table class="message-fields">
<thead>
<tr>
<th>Field</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr id="istio-policy-v1beta1-Value-string_value" class="oneof oneof-start">
<td><code>stringValue</code></td>
<td><code>string (oneof)</code></td>
<td>
<p>Used for values of type STRING</p>

</td>
</tr>
<tr id="istio-policy-v1beta1-Value-int64_value" class="oneof">
<td><code>int64Value</code></td>
<td><code>int64 (oneof)</code></td>
<td>
<p>Used for values of type INT64</p>

</td>
</tr>
<tr id="istio-policy-v1beta1-Value-double_value" class="oneof">
<td><code>doubleValue</code></td>
<td><code>double (oneof)</code></td>
<td>
<p>Used for values of type DOUBLE</p>

</td>
</tr>
<tr id="istio-policy-v1beta1-Value-bool_value" class="oneof">
<td><code>boolValue</code></td>
<td><code>bool (oneof)</code></td>
<td>
<p>Used for values of type BOOL</p>

</td>
</tr>
<tr id="istio-policy-v1beta1-Value-ip_address_value" class="oneof">
<td><code>ipAddressValue</code></td>
<td><code><a href="#istio-policy-v1beta1-IPAddress">istio.policy.v1beta1.IPAddress (oneof)</a></code></td>
<td>
<p>Used for values of type IPAddress</p>

</td>
</tr>
<tr id="istio-policy-v1beta1-Value-timestamp_value" class="oneof">
<td><code>timestampValue</code></td>
<td><code><a href="#istio-policy-v1beta1-TimeStamp">istio.policy.v1beta1.TimeStamp (oneof)</a></code></td>
<td>
<p>Used for values of type TIMESTAMP</p>

</td>
</tr>
<tr id="istio-policy-v1beta1-Value-duration_value" class="oneof">
<td><code>durationValue</code></td>
<td><code><a href="#istio-policy-v1beta1-Duration">istio.policy.v1beta1.Duration (oneof)</a></code></td>
<td>
<p>Used for values of type DURATION</p>

</td>
</tr>
<tr id="istio-policy-v1beta1-Value-email_address_value" class="oneof">
<td><code>emailAddressValue</code></td>
<td><code><a href="#istio-policy-v1beta1-EmailAddress">istio.policy.v1beta1.EmailAddress (oneof)</a></code></td>
<td>
<p>Used for values of type EmailAddress</p>

</td>
</tr>
<tr id="istio-policy-v1beta1-Value-dns_name_value" class="oneof">
<td><code>dnsNameValue</code></td>
<td><code><a href="#istio-policy-v1beta1-DNSName">istio.policy.v1beta1.DNSName (oneof)</a></code></td>
<td>
<p>Used for values of type DNSName</p>

</td>
</tr>
<tr id="istio-policy-v1beta1-Value-uri_value" class="oneof">
<td><code>uriValue</code></td>
<td><code><a href="#istio-policy-v1beta1-Uri">istio.policy.v1beta1.Uri (oneof)</a></code></td>
<td>
<p>Used for values of type Uri</p>

</td>
</tr>
</tbody>
</table>
</section>
